Lifting device



J. J. DUCKWORTH LIFTING DEVICE Original Filed Feb. 2, 1924 d'rawings, inwhich Patented Aug. 9, 1927.

UNITED V'IST-ATEZQSM I 1,638,090 PATENT 1 caries;

JOSEPH-JAMES DUCKWORTH, or SALT LAKE CITY, QU TA'HH ASISIGNOR orrrr'ry-rwo PER CENT TO T. OJDUCKWORTH; or SALT-LAKE .ICITYMUTAH.

LIFTING nnvicn Original application filed February 2, 1924, Serial No.690,254. Divided and this application filed August 5,1926. Serial No.127,395. I

This invention relates topumps for liftmgliquidsand is directedparticularly to an improved valve cage and the details thereof wherebyit may cooperate With a special,

5 device for liftingfthe'cage through the pump cylinder. i I

' One feature .is the construction of the re movable cagewhich has acentral opening at the top through which: a valve ball may be inserted.After the ball is inserted,- radially extending'dugsi are screwedcent-rally into the top opening, thus serving thedualfunction of;preventing the-upward displacement of the" ball and also:constitutingmeans *by which the cagemaybe'lifted wit-h the use of a peculiarlyshaped grapple device-which is"describedand claimedin my cop'endingapplicationfSerial3N0. 690,254; now Patent Nof 1,600,956ffrom which thisapplication has been'fdi vided. f

I The above and additional features and-advantages will. be; described"and claimed in detail 'cin the following specification and claims,and-illustrated in the accompanying 'Figure 1 is a centr ahverticalsectional view's'howing a pump cylinder having the particular valve cageof the present invention located at its lower end;

Figure 2 is a Vi'GW of the same pump cylinder 'as illu'strated'in"Figure' 1. with the lower valve cage shown in elevated position aslifted by the-particular grapple device shown in Figure 5; FFigure 3"isa'vi'ewlo'oking downwardly at the .top of the valve cage when thegrapple ide iceof' fFigure-5 is beingintroduced' into 'the'top of thevalve cage;

." Fi'gure't is ase'ctional view taken on the line 41- 4- of Figure 2,looking downwardly and illustrating how the grappleradially projectingarms engage and support the corresponding lugs of the valve cage; and

5 Figure 5 is a" front elevation of the grap- "lugs bf the v'alve cage.

"Likereferlance characters refer toflike" parts of the different figuresof "the f drawthe-hall 8 is adapted to normally :rest. At

the extreme lower end of the v-al-ve'cage ings.

, likewise provided with a ball valve. lie the plunger 2.

the threaded portion 4: wall-to lock these parts against relative ro-'-tation. Aball 5is normally positioned with in the central hollow spaceof the plunger ple 'deviceused for engagement with the I I Y through thelength of "lRef-erring in'detail to the drawings; the figures illustratea pump cylinder having in conjunction 'therewitlr a lower cage valvewith a b-all'therein and a-Working plunger cylindrical cylinder of apump in which a 1 The working I through which liquids to be 1ng=movementof the plunger. "The extreme upper end wall of the plunger is terminatedwith a relatively sharp edge adjacent the cylinder wall which isso"designed in order that sand or like abrasive material'will not tend tocollect adjacentflthe cylinder Wall and injure the same. A recess 2 isprovided -at one side of the upper end of the plunger,

through-which a cotter-pin 3 -extends to lockthe The lowerend isprovided with an internal threaded-portion 2 in Which a flanged collar 4projects,.a f threaded extension 4 the threaded portion 2 locking set ofthe collar engaging of the plunger. A screw 6 projects from the lowerflange 4; upwardly andrengages "and the plunger face of the and duringthe lifting movement of the plunger the ball normally rests on .theupper inner circular edge of the portion't thus closlngthe openingthrough'the flanged 001- I I passage of liquid downlar 4 and preventingwardly throu'gh the plunger. r To removethe ball" from within theplunger or to insert it in the plunger, it is necessaryto remove thelockingscrew 6 and to unscrew "the flanged collar t from the plunger 2.

The cage'valve 7-is positioned at the lower endof the pumpcylinder 1 andprojectsbelow the pump'cylinde'r. The cage valve 7 has: a1113.111bO'ClyPOI'tIOII'WltlI a cylindrical exterior and "which isremovableupwardly the pump cylinder, as will bedesc ribed. 7 is abeveled seat within the body offthe cage: upon which'seat there are aplurality of openings 7" through which liquid renters during the liftingstroke of the pump. At the upper end of the cage there is: an annularlaterally .-'projectingpump rod- 3 withrespect 'toitheof the plunger 2shown in Figures 3 and flange 7, the outside diameter of which isslightly less than the inside diameter of the pump cylinder. The cage 7has upper end openings with side walls 7. The cage is supported at theextreme lower end of the cylinder 1 by means of a screw-threaded collar9 which has an inwardly extend mg flange 9 loosely encircling thecylindrical. body of the cage 7 and on the upper surface of which thelower side of the flange 7. of the cage is adapted to rest and provide acomparatively water-tight fit. The lower endotthe pump cylinder 1 isscrew threaded at 1 to receive the collar 9. I

The lifting device for removing the valve cage 7 upwardly through thepump cylinder will now be described. In the upper por tion of the valvecage 7 are a plurality of lugs 10 which extend radially and centrallyfrom the side wall. 7 and thus projectinto the-upper end opening of thecage. These lugsarc illustrated in'Figures 1 and 2 as screw threadedthrough the wall of the cage an-dthrough the projecting flange'fi. As

4 the lugs 10 project only sufficiently far so that they may be engagedby a grapple device which is insertable centrally through the upper endopening of the valve cage, as will be described. The grapple deviceshown in side elevation in Figure 5 consists of a body block member 11having a central opening 10*, (see Figure 2) for the reception of thethreaded end of an operating rod. A plurality of radially extending arms11 are shown as having grooves or notches in their upper surfaces inwhich the lugs 10 are adapted to be seated when the grapple device isbrought into engagement with the valve cage and with the lugs for theremoval of the cage upwardly. Preferably the upper portion of the block11 is tapered, as shown in Figs. 2 and 5, so that it may be guidedeasily into position during the upward movement.

Then the cage is in position at the lower end of the pump cylinder, asillustrated in Figure 1, and it is desired to lift the cage upwardly,the following is followed. The pump rod 3 and the plunger 2 are drawnupwardly and removed from the cylinder. The pump rod 3 may then bedisconnected from the plunger or a similar rod may be used and the rodor its substitute is threaded into the opening 11 of the grapple device11. The device is then lowered downwardly and inserted into the upperend opening of the valve cage 7, and downwardly along the wall 7substantially as represented in Figure 3, the arms 11 lying betweenadjacent lugs 10. Then the rod 3 and the grapple device with respect tothe valve cage until the arms 11 arebrought into registry immediatelybeneath the lugs 10. The device is then cylinder and a pump generalprocedure on said pump part, of a lug engaging eleplacement of said pro11 is rotated lifted upwardly and the lugs vbecome seated in the groovesof the arms 11", and the valve cage may then be drawn upwardly throughthe pump cylinder, substantially asshown in Figure '2. a

It will thus he undershmd that the present invention provides animprovement in lifting pumps whereby the lowermost or foot valve may beremoved without necessitating the removal of the entire pump cylinder orother pipe on which the valve is mounted. The invention includes alsothe peculiar position-of the valve cage which located chiefly below thecylinder and yet may be; removed upwardly through it. a V

The material of which the parts are 'constructed may satisfactorilyinclude a steel tube or cylinder, a brass or bronze plunger worlzingwithin the cylinder, and a lower foot valve cage which likewise is,preferably of brass or bronze. The valves include balls which may be ofsolid rubbed or other relatively heavy durable material which will serveto close the respective openings in the plunger andthefoot valve.

Iclaim:- y 1. In pump apparatus having a pump part removable upwardlythrough the cylinder, the combination with a plurality ofcentrallyeXtending lugs carried on said pump part and having theiradjacent ends spaced fromeach other, of a lug engaging element adapted.to enter endwise between the spaced. ends: and adapted to be rotatedwithrespect to saidfends and to engage the under faces of said'lugswhereby said pump part is removable upwardly, said lug engaging elementincluding a body block and means for coacting with said lugs, said bodyblock having its upper portion tapered toward the upper end whereby froma location below the lugsthe block may be guided upwardly into positionbetween the spacedends of said lugs.

2. In pump apparatus having a pump cylinder and a pump part removableupwardlythrough the cylinder, the combination with a centrally extendinglug carried ment adapted to be moved endwiseof said cylinder and saidpump part until it is below the level of said lug, then .rotatedWithrespect to said pump part until said lug engaging element registers withand engages said lug and then moved upwardly to raise said pump part,said lug and saidlug engaging element having a complementary projectionand seat for receiving said projection whereby accidental angular-dis-'ection and seat is pre-' vented.

'8. A device for lifting pump parts from pump casings and cylinders fromdevice comprising a body block adapted'to be lowered centrally down apump cylinder,

the said radially extending arms carried b said body block and adaptedto engage their upper surfaces with the under surface of a correspondingpart of a pump part to be lifted, said arms having on their upper sidean irregular surface adapted to engage a complementary surface on theunder face of the pump part to be engaged by said arms, whereby theirregularity prevents accidenta angular slip between the parts.

4:. A device for lifting pump parts from 'pump casings and cylindersfrom the said device comprising a body block adapted to be loweredcentrally down a pump cylinder, radial arms carried by said body blockand extending toward the wall of said pump cylinder, said arms havinggrooves on their upper surfaces in which grooves corresponding parts ofa pump part are adapted to seat when the part is lifted,

5. A device for lifting pump parts from pump casings and cylinders fromthe said device comprising a body block adapted to be lowered centrallydown a pump cylinder, radial arms carried by said body block andextending toward the wall of said pump cylinder, said arms havinggrooves on their upper surfaces extending to the ends of the arms inwhich grooves corresponding parts of a pump part are adapted to seatwhen the part is lifted.

' In testimony whereofI affix my signature.

JOSEPH JAMES DUCKWORTH.

